Boiler and setting therefor



'Dec. 1924. 1,517,291

D. S. JACOBUS BOILER AND SETTING THEREFOR Original Filed Feb. 17 1 22 5Sheets-Sheet 1 V I I I I INVENTOR CWJM4 ATTORNEYS Dec. 1924- 1,517,291D. s. JACOBUS BOILER AND SETTING THEREFOR Original Filed Feb. 17, 1922 5Sheets-Sheet 2 INVENTOR QW1/f t1; ATTORNEYS D. S. JACOBUS BOILER ANDSETTING THEREFOR Original Filed F 17, 1 22 5 Sheets-Sheet IN VEN TOR. 4g

/M A A TTORNEYS.

Dec. 2, i 24. I 1,517,291

' D. S. JACOBUS BOILER AND SETTING THEREFOR Original Filed Feb. 1'7 1922, 5 Sheets-Sheet 4 E .L'EELlE- 9 w mTTORNES S.

D. .S. JACOBUS BOILER AND SETTING THEREFOR Original Filed Feb. 1'7 19225 Sheets-Sheet 5 INVENTOR. I

BY 9 1 V M I ATTORNEYS.

Patented Dec. 2, 1924.'

7 DAVI s. JACOBUS, 0E JERSEY cITY, NEW JERSEY, ASSIGNOR To EE EABcocx &

WILCOX ooMrANY, or BAYONNE, NEW JERSEY, A CORPORATION or NEW JERSEY.

BOIlZER AND SETTING T E-Eran. 7

Application filed February 17, 1922, Serial No. 537,154. Renewed A ril25, 1924.

T 0 all whom it may concern.-

Be it known that I, DAVID S. Jacoevs, a

citizen of the United States, residing at P Jersey City, in the-countyof Hudson and.

State of New Jersey,'have invented certain new and useful Improvementsin a Boiler and Setting Therefor, of which the following is aspecification. I

One of the objects of my invention isthe provision of novel means forventilating furnace walls.

Other objects of my invention willappear in the specification and willbe partic-.

ularly pointed out in the claims.

My present application is a continuation in part. of my applicationSerial No. 401,568,

which was filed in the Patent Otfice on or about August 6, 1920. D v

My invention will best be understood by reference to the accompanyingdrawings, in which like reference characters indicate like parts, andin'which Figure 1 is a longitudinal section through a boiler and itssetting embodying. my invention; "Fig. 2 is asection taken on the planeof the line 2-2 "of Fig. 1; .Fig. .3 is a longitudinal section is a.side view, on an enlarged scale, of the similar to Fig. 1 butillustrating a boiler adapted for burning either oil or powdered fuel,or both; Fig. 4 is a vertical sectional wiew through a portion of thefurnace wall and the outer walls spaced therefrom, and illustrating amodified arrangement for holding the walls in alinement and spacedrelation; Fig. 5. is a plan view of special tiles of the inner and outerwalls, respectively, illustrating a tie-piece in positionin the .tiles;Fig. 6 is a sectional view taken along the; plane of the line 6-6 ofFig. J Fig. 7 is a sectional elevation taken along the" plane of theline 'T? of Fig. 6; Fig. 8

tie and Spacing piece illustrated in Fig-.13;

, and spacing piece; Fig. 13 is a vertical sec-v tional view through afurnace wall and through a metallic casing spaced therefrom,anddllustratmg, means for holding the fur.-

nace wall and an outer. casing in spaced relation: Fig. 14 is ahorizontal sectional view taken between two courses of bricks of twospaced walls and illustrating a. modified arrangement of tying the wallstogether; Fig. 15 1s a vertical sectional view through the wall of Fig.let and along one of the tietaken along the line 17--17 of Fig. 16; Fig.6

18 is a plan view of one of the bonding tiles of the outer wall'of Figs.16 and 17; Fig. 19

isa side view of the tile shown in Fig. 18; Fig. 20 is ahorizontalsectional vi w taken alongthe line 20 -20 of Fig. 21 and illustrating amodified arrangement for holding two walls in alinen ient and in spacedrelation; Fig. 21 s a vertical sectional view takenalong'the line 21-21of. Fig. 20; Fig. 22 is a vertical sectional view, similar to Fig.

'21 but illustrating both walls inclined, and Fig. 23 is an elevation,taken from within the furnace, of the parts illustrated in Fig.

. Figs. 1 and :2 illustrate a boiler of the 0 series type embodying myinvention, which is fired by astoker 83, which is here shown as of theunderfeed type. The gases are directed from thefurnace chamber 84 by theroof baffle 85 over the intermediate wall 5 lower part of the wall 86 isthickened and v forms a shelf, at 86. which comes beneath Fig. 9 is aplan'view similar to Fig. 5, illusthe rounded ends of the tubes, thusforming a support for the other end of the boiler.

The bent ends of the tubes are also supported by members 86" projectingfrom the wall and bythe spacing strips 39. Hooked members 86 also extendfrom the bonding tiles 86 and engage the looped ends of the tubes,thereby holding the wall in position? From this flue the gases aredirectedto the outlet flue 92, dampers 93, operatedby-connectionsextending to a pointwit-hout the boiler, being providedfor controlling the water passes to the feed tank'9'8 by a'pipe 99. Inthe form here illustrated, the-lower end of the pipe 99 is preferablyformed with a perforated-loop 100 near the bottom of the feed-watertank, so that the heated water will mingle with the water in the feedtank. The pipe 99 has a throttling-valve 101 to effect the regulation. Y

A steam pump 102 draws the feed water from the feed tank 98 through thepipes 103 and forces it through the pipe 104 to the lowermost header ofthe boiler. The steam and water-in the. boiler tubes flows upward,

accordingly, in a direction opposite to the -flow of the gases,

so that .the counterflow principle is established.

'In accordance with my invention, the air which isused in-the stoker,orother fuel-' burning device, is preferably passed over the setting ofthe boiler, in order to utilize any heat radiated thereby and, at thesame time, to cool the walls. Acasing 105 is, accordingly, providedaround the setting and spaced therefrom on its sides, and .in front andabove the boiler, as shown. .The walls 21 are built up in part ofhorizontal. rows tile are placed near together, to hold the of groovedbonding tiles 21; The bonding tiles are held by cast-iron pieceswhich'engage the grooves of the tiles and which, in

turn, engage with the horizontal fixed stif femng members 21. 'The rows.of bonding wall ;,in ,complete alinement. Cast-iron pieces 21."are soarranged that the may slide from side to-side overthe horizontal members21", and are so constructed that the wall can expand upward withoutcausing them to bind and bring excessive strain on the bonding tile. Thewall may, therefore,

expand in both directions without producing any great strain on. thebondin which the wall can be kept in alinement without breaking thebonding tile. The

' upper part of the casing was held in saline 'sides. This we means ofthe horizontal rows of 'bo'nding ment by means of vertical members21f.attached to and spaced at intervals along the horizontals stiffening.members 21". The

transverse wall 86 (indicated above the wall tile shown in cross-sectionat 86.

By extending the metallic connecting memhers across the air space,.th'eflow of the air 'used for cooling the walls keeps the metallic memberscool.

the air in the way described,

tile, and an arrangement is, thereby provi ed in' I 105 which are Air isforced into the space between the setting and the casing at the rear ofthe wall 86 and at the bottom of said space by a fan 106, which takesthe 'air from outside the casing; The air is forced upwardly downwardlyover the si es, and front of circulating 1t 'flows ina generally reversedirection to the flow of the hot gases, and the coolerair comes incontact with the coolest part of the setting.

From the fan 107'the air passes to the the furnace to the fan 107. By

stoker, exceptfor a small part, which is supplied to the furnaceside-wall cooling device 108. ,By providing the two fans, as ,described,the air may be circulated over the setting without undue leakage throughthe walls, as the fans may be operated to giveanydesired pressure in thespace between the casing and the walls.

The boiler illustrated in Fig. 3 is, ingeneral, similar to thatshown-inFig. 1, but is. adapted for burning either oilor pow- (leredfuel, or both, the oil-burners being indicated at 109 and thepowdered-fuel apparatus at 110, a suitable refractory lining 111 for thefurnace chamber being-provided, against which the flame 'or, the fuelcloud, as the case may be, impinges.- ure, the'intermediate cross-wall112 is of a -slightly modified form, to accommodate itself to therefractory lining 111. The air circulation is here maintained b a singlefan 113, which takes air from t 1e outside In this figthrough a flue 114and forces itaroundthe setting, in the manner describedinconnecapparatus 109 or the powdered-fuel apparatus 110, as indicatedby arrows. "A passage 115, in this construction, conducts a regulatedamount of air from the fan 113' to the furnace chamber 116,.theregulation being secured by adjusting the damper 115". Bonding tiles 21"and 86 are placed in the furnace walls 21 and 86, respectively, to holdthem in alinemenh The cast-iron pieces 21, which engage withthe bondintiles, hook lover the edges of horizonta Z-bars which are attached tothe outer casing. The air which is forced between the walls and thecasing, passes between the cast-iron pieces 21% The casing is reen-vforced by the horizontal stiffening members placed outside of thecasing. Figs. 4, 5,6, 7 8 and 9illustrate a device in accordance with myinvention for holding two walls in alinement and in spaced rela tion.The furnace wall 117 is provided with special'bonding tiles 118,,liavinrecesses 119, in which the inner curve end 1 of the tie-piece 120 isreceived. The outer "nace walls, the cooling effect of the air .cir---culated between the outer wall and'the furwhere the cooling effect, dueto the circula- I wall 117 is similarly provided with special tiles 121provided with recesses 122 in which the outer ends of the tie andspacing pieces 120 are received. The ends of the pieces 120 are soformed that they may be introduced into place in the outer wall afterthe latter is constructed. This would be done before building up theinner wall. \Vith 'the' arrangement illustrated in Fig. 4, the innerfurnace wall is made thinner than standard furnace walls. By employingthin furnace walls is greater than it wouldbe with thicker furnacewalls, as there is a less resistance to the passage of heat through thethinner walls. lVhere furnace temperatures are excessively high, theinterior of the wall, that is, the furnace side of the wall, will fuseand slough off. By making the. inner furnace wall thin and layingu'p thesame entirely of solid fire-brick, as illustrated, an excessive furnacetemperature would simply thin the walls down to a point tion of the air,would check any further fuslng or sloughing off of the brick, as whenthe wall became sufliciently thin the inner against theside of thespecial tile.

In place of making the special brick or tile so that the tie and spacingpieces can be introduced after one of the walls is laid up, they may bemade as indicated in Fig. 12

.in which the ends of the tie-pieces are bent more sharply than thetie-piece illustrated in Fig. 8 and in which the recess 12l of the secial tile 125 conforms to the bent end of t e tie and spacing piece123. \Vith .such an arrangement, the tie and spacing pieces would belaid up with the walland could not be hooked in after the .wall is laid.

In Fig. 13 I have illustrated a further modification of my invention, inwhich the inner furnace wall is also thinner than inordinaryconstructions and in which the wall is laid up of solidfire-brick and is spaced from an outer casing, the casing beingparticularly advantageous where the same is located above a stoker.Spacing pieces 123, which are preferably of the form best shown in Fig.12, are formed ofa cylindrical iron piece bent at the ends, asindicated, so that one end engages a reccss 124'in a special tile 125,the opposite end of the spacing piece preferably being similarly bentand engaging an opening in an angle-iron 126 secured in the casing. Inthe claims, I have defined as a wall the member spaced from the furnacewall, and intend to cover by this term either an outer brick wall or ametal casing, or both. The form of brick and spacing pieces shown inFig.6, in which it is possible to introduce the spacing piece after onework to that shown in Fig. 13.

In Figs. let and 15 -I have illustrated a further modified arrangement,in which one of the walls, preferably the inner wall 117,

is provided with special tiles 127, which project outwardly beyond theface of the wall and in which the special tiles 128 of the outer walllli' 'may be formed similarly to those illustrated in Fig. 5. With thearrangement here shown, the tie-pieces 129 of the walls is laid, ispreferable for most having bent ends, maybe inserted inthe outer walland the opposite end then dropped into the recess of the special tile127. 7

Figs. 16, 17, 1S and 19 illustrate a further modification, in which theinner and outer walls are provided with special tiles 130 and 131,respectively, which preferably abut.

against each other, as indicated. The tile I130 is preferably providedwith a groove 130 formed with a vertical shoulderat 132, as illustratedin Fig. 17, while the tile 131 is preferably formed with a groove 133similar in form to the groove 130 but extending only partially acrossthe tile, as indicated in Fig. 16. A tie-piece 13-1 is provided on. itslower side with a recess 135 adapted to engage the inner ends of thetiles, as best shown in Fig. 17, and having shoulders 136 for engagementwith the shoulders formed by the grooves on the two abutting tiles.

Figs. 20 and 21 illustrate a further modification of my invention inwhich the outer wall 137 -is vertically disposed and laid against aplate, or plates, 138, which engage vertical buckstays 139. The innerwall 140 is upwardly and outwardly inclined and is provided withseparated spacing tiles 111' which lean against the inner face of theouter wall, so that the gravity .component of the inner wall serves tomaintain the-outer wall in position. against-the buckstays and, at thesame time, maintains the inner wall in spaced relation to the outerwall. 1

Figs. 22 and 23 illustrate still a further modification, in which thebuckstays 139* are inclined and the outer wall 137 leans against thebuckstays, the inner wall being provided with spaced tiles 1&1 whichrest against the inner face of theouter wall to maintain the inner wallin alinement and in spaced relation to the outer wall.

The air which enters the furnace is preheated by contact with t-heboiler setting,

thus increasing the .efliciency of the furnace "and assisting in themaintenance of the setting by cooling the walls. \Vhat I claim anddesire to secure by Letters Patent of the United States is:

1. 'In a steam boiler, a furnace and boiler setting, an outer wallspaced from the walls of said setting, a forced-blast fuel-burningstoker for'forcing a-ir thereto.

v 3. In a steam boiler, a furnace," a flue disposed beslde the furnace,a steam holler disposed withinthe flue, an outerwall from the'furnaceand flue', andmeans for outer wall over the wallsof said flue and blastfuel-burning device therefor, a fine dispassing cooling air upwardlywithin said downwardly over 'the' walls of said furnace.

4. In a steam boiler, a furnace, a forcedp'osed beside said furnace, asteamboiler disposed within said flue, an outer wall spaced from thewalls of said furnace, and means for forcing air within said outer wallupwardly over the walls of said flue and downa-rdly over the walls ofsaid furnace to said fue'l burning device.

5. In a steam boiler, a-furnace, aforcedblast fuel-burning devicetherefor. a flue dis-' posed beside said furnace, a steanrboilerdisposed within said'fiue, an outer wall spaced from the walls of saidfurnace, afanfor' forcing air within said casing upwardly over the wallsof, said fine and downwardly over the walls of said furnace, anda secondfan .disposed adjacent said stoker for forcing the air from thespa-cezwithinsaid casing to'said fuel-burning device. i

I 6. In a' steamboiler, a boiler setting,-an o1 1 ter;wall spaced fromthe walls of said setting, means for passing air-through the spacebetween the two walls; the vertically extending walls of the settingcomprising courses of blocks, one or. more of the courses having groovedblocks, afixed cross member and metallic tie-pieces cross member and thegrooves of the blocks, and arranged to allow the blocks to move in anydirection in a generally vertical plane, the tle-pieces assisting-inholding the walls in proper alinement, "I s 7. In asteam boiler, aboilersetting, .an outer wall spaced from the walls of said setting, means forpassing air through the a fixed cross member and vdevice for saidfurnace, and means for pass--- spaced walls of the setting said firstengaging the fixed space between said walls, the walls of the settingcomprisingrourses of blocks, one or more ofthe courses having groovedblocks, metallic tie-pieces engaging the fixed cross member and thegrooves of the blocks,- and arranged to allow the blocks to move 'inanydirection in a generally vertical 'plane,- the tie-pieces assisting inholdin the wall in proper vegtical alinement, and means associated withsaid fixed member for maintaining said outer wall in alinement. 4 i

' 8. A setting for a boiler,

holdingthe wall in alinement', an outer wall spaced from the walls ofsaid settin fixed supporting members engaging botl thebonding tile andthe casing, and means for passing air throughthe space between saidouter wall and the walls of the furnace.

outer wall, and a second fan located between said first fan and saidfuel-burnin device for forcing air delivered from said first fan to saidfuelburning device. '19. In asteam boiler and its setting, a-fucl-burning device, a flue enclosed by the for conducting gases fromsaid fuel-burning device, a steam boiler located in said flue, an outerwall spaced from said furnace walls, afan located beneath the boilerfloor for forcing air through the space between said furnace wall andsaid outer wall, and a second fan located between fan and saidfuel-burning deviceand beneath the boiler floor for forcing airdelivered from said first fan to said fuelburning device' 1151s a steamboiler and its setting, a

. fuel-burning device, a combustion chamber said gases 'passdownwardly,a steam boiler located in said flue. said combustion chamher and saidflue being enclosed by the walls of said setting, an outer wall spacedfrom the walls of said setting, means forming with said veasingan airpassage in the space between said outer wall and saidfurnace Walls andopposite said combustion chamber and said flue, and .a fan; for forcingair through said passage in a directionopposite to the flow of gases insaid combustion chamher and said flue.

12. In a steam boiler and its setting, a fuel-burning device, a-combustion, chamber in which the gasesfrom said fuel-burning devicepassupwardly and a 'flue in which said *gases pass downwardly, a steamboiler comprising a i wall having parallel rows 'of bonding-tile for-.space between said furnace walls and said located in said flue, saidcombustion cham'-- her and said flue being enclosed by the walls of saidsetting, an outer wall spaced from the walls of said setting, meansforming with said casing an air passage in the space between said outerwall and said furnacewalls and opposite said icombustion cham-' her andsaid'flue, a fan -for' forcing air from said first fan to saidfuel-burning de-.

vice.

13. In a steam boiler and its setting. a'

fuel-burning devlce, a combustion chamber in which the gases from saidfuel-burning device pass upwardly and a flue in which of said set-ting.an outer wall spaced front said gases pass downwardly, a steam boilerlocated in said flue.'said combustion chamber and said flue beingenclosed by the walls the walls of said setting, means forming" withsaid casing an air passage mthe space between'saidouter wall and saidfurnace.

walls and opposite said combustion chamber and said flue. a .fan locatedbeneath the boiler floor for forcing air through said passage in adirection opposite to the flow of gases in said combustion chamber andsaid flue, and a second fan located between said first fan and saidfuel-burning device and beneath the boiler floor for forcing airdelivered from said first fanto said fuelburning device.

14. In a steam boiler, a boiler setting. an outer wall spaced from thewalls -.of said setting. the vertically extending walls .of;

the setting comprising courses of blocks, one or more-,of the courseshaving grooved blocks. a fixed cross member located between said furnacewalls-and said outer wall, and metallic tie-pieces engaging the fixedcross member and'the grooves of the blocks, and

arranged to allow the blocks to move in any direction in a generallyvertical plane. the tie-pieces assisting in holding the wall in propervertical alinement, and connectionsbetween said fixed cross'member andsaid outerwall for holding. the latter in alinement, the parts beingconstructed and arranged to permit of the passage. of air vertically inthe space within said casing.

15. In a steam boiler audits setting. a fuel-burningapparatus, a flue, asteam boiler having heating surface located. in said flue, a combustionchamber. the gases passing in opposite directions in said combustionchamber and said flue.- and means for conducting air over, the. walls-ofthe" setting enclosing said fine and said combustion chamber inopposition to the flow of gases therein to the fuel-b urning apparatus.

16. In a steam boiler and its setting. a

which cooling air may be ing fuel-burning apparatus, a flue, asteam'boiler having heating surface located in said flue, a combustionchamber. the gases passing upwardly in said combustion chamber anddownwardly in said flue. and means for conducting-air over the walls ofthe setting enclosing said flue and said combustion chamber inopposition to the flow of gases therein to the fuel-burning apparatus.

17. In a steam boiler and its setting, a

furnace wall. a second wall spaced from said furnace wall and forming a,flue through which cooling air may be passed, means for maintaining bothof said'wa lls in alinement and in spaced relation and permittingrelative movement between the two, and means for conducting cooling airthrough the space between said walls. i

18. In a steann boiler and its setting, a furnace wall. a second wallspaced from said .furnace walland forming a flue through which coolingair may be passed, means for maintaining both of said walls in alinementand in spaced relation and permitting relative movement etwee n the two,and means for conducting cooling airthrough the space between saidwalls-and t0 the furnace.

19. In' a steam boiler and its setting, a furnace wall. asecondwallspaced from said furnace wall and ;.forming a flue. through passed, afixed member located adjacent to said walls, and means cooperating withsaid fixed member formaintaining said walls in alinementandin spacedrelation.

20. In a steam boiler and its setting, a furnace wall, a second wallspaced from said furnace wall and forminga flue througlr which coolingair may be passed. a fixed cross member located between said walls, andmeans associated with the respective walls and cooperating with saidfixed memin spaced relation.

21. In a. steam her for holding said walls in alinement and boiler andits setting, a

thin furnace wall, a second wall spaced from said furnace wall andforming a flue through which cooling air may be passed, means formaintaining both of said walls in alinement and in spaced relation andpermitting relative movement between the two, and means for conductingcooling air through-the space between said walls.

22. In a steam boiler and its setting, a furnace wall not more than teninches in thickness. a second wall spaced from saidfurnace wall andforming a flue through which cooling air may be passed, means formaintainboth of said-walls in alinement and in spaced relation andpermitting relative movement between the two, and means for conductingcooling air through the space between said walls.

K 23. In asteam boiler and its setting. a

furnace wall not more tlianxten inches in thickness laid up of solidfire-brick, a second wall spaced from said furnace wall and forming aflue through which cooling air may be passed, means for maintaining bothof said walls in alinement and in spaced relation and permittingrelative movement benaee wall and forming a flue through whichcoolingair may be assed, means for maintaming both of salt walls 111ahnement and in, spaced relation and permitting relative movementbetween the two, and means for 'tile therein, "tile wlth the outer wallacross such space conducting cooling air through the space be? tweensaid walls.

:25. In a steam boiler and its setting, a furnace wall not more than teninches in thickness, an outer lwall'spaced from said furnace wall andforming therewith an air passage, and means comprisingtwo fans forcausing air to pass through said passage, the respective fans beinglocated at opposite ends of said passage. 1

26. In a steam boiler and its setting, a furnace wall, an outer wallspaced from said furnace wall to. form an air passage, and

tie-pieces joining said walls to maintain them in spaced relation andconstructed and arranged to permit relative motion between the two wallsin a. direction parallel to the planes of said walls.

27. In a steam boiler and its setting comprising a stoker, a furnacewall, brick walls on the sides of the furnace and spaced therefrom, anda front wall consisting of a metallic casing spaced from the frontfurnace. wall, means for holding the furnace walls and the outer wallsin alinement and in spaced relation, and means for passing cooling airbetween the spaced walls.

28. A furnace wall, comprising an inner and an outer wall spaced apartto permit the passage of air through such space, and tie pieces spacedapart and connecting the inner and outer walls across such space andconstructed and arranged to permit relative motionbetween the two wallsin a direction parallel to the plane of the wall. 7

29. A furnace wall, comprising an inner and an outer wall spaced apartto permit the passage of air through such space, said inner wall havinga plurality of courses of and tie pieces connecting said and constructedand arrangedto permit relative motion between the two walls in a direcationparallel to the plane of the wall.

' 30. A vertically extending furnace wall, compr sing an inner wall andan outer wall spaced apart to permit the passage of air throu 11 suchspace, and metallic tie pieces space apart and connected to said innerwall and engaging fixed portions of the outer wall, said tie piecesbeing located in such space and constructed and arranged topermit-relative motion between the two walls in a direction paralleltothe plane of the wall. i

31. A vertically extending furnace wall, comprising an inner wall and anouter wall spaced apart to permit the passa e of air through such space,said inner wall having a plurality of courses of tile therein, andmetallic tie pieces connected to said tile and engaging fixed port-ionsof the outer wall,

said tie pieces being located in such space and constructed and arrangedto permit relatire motion between the two walls in a direction parallelto the plane of the wall.

32. In combination, a furnace provided with a .wall comprising an innerand an outer wall spaced apart, means for passing ail-between said wallsfor cooling the same and for supplying said'air to furnace forcombustion, the inner wall having a plurality of courses of tiletherein, and tie pieces connecting said tile with the said outer wallacross the space between the two and constructed and arranged to permitrelatlve motion between the two walls in a direction parallel to theplane of the wall.

33. An air cooled furnace wall comprising an inner wall and an outerwall spaced from said inner wall. bonding tiles in said wall, metallicmembers located within the space between said inner and outer wallsandengaging said bonding tiles to'maintain said walls in alignment, andmeans for passing cooling air through the space between said inner andouter walls and over said members.

34:. An air cooled furnace wall comprising an inner wall and an outerwall spaced from said inner wall, bonding tiles in said wall, metallicinemlm-s provided with hooked ends which rest in openings in saidbonding tiles and located within the space between said inner and outerwalls and engaging said bonding tiles to maintain said walls inalignment, and means for passing cooling air through the space betweensaid inner and outer walls and over said members.

35. An air cooled furnace. wall comprising an inner wall and an outerwall spaced from said inner wall. bonding tiles in said wall, metallicmembers provided with hooked ends which rest in openings formed in thesides of said bonding tiles and located within the space. between saidinner and outer walls and engaging said bonding ti es to maintain saidwalls in alignment, and means for passing cooling air through the spacebetween said inncrnnd outer walls and over said members.

36. An air cooled furnace wall comprising an inner wall and an outerwall spaced from said inner wall, bonding tiles/in said wall, metallicmembers provided with hooked ends which pass "downwardly into openingsin said bonding tiles and located' within the space between said innerand outer walls and engaging said bonding tiles to maintain said wallsin alignment, and

:and over said members.

. K ,and OTi l' Sa-ICL membersmeans for passing cooling air through the.bers.

38. An air cooled furnace wallfcomprising an inner wall and an outerwall spaced from said inner wall, bonding tiles in said wall, metallicmembers provided with hooked ends which pass downwardly into openingsformed in the sides of" two adja-- centbonding tiles and located withinthe space between said mner and outer walls and engaging said bondingtlles to'main- 'ta in said walls in alignment, and means for passingcooling air through the space between said inner and outer walls antiover said members.

39., An air cooled furnace wall compris ing an inner wall and an outerwall spaced from 'said inner wall, bonding tiles in said wall,metallicmembers provided with hooked ends so arranged that they ma; 'beintroduced in place in the bonding tiles when the latter are laid up inthe wall and do not project beyond the outer face of the wall 'said,metallic membersbeing' located within the space betweelrsaicl inner andouter walls and engaging said bonding tiles to maintain said walls inalignment, and means for passing cooling air through the space betweensaid inner and outer walls.

40. An air cooled furna wall comprising an inner wall and an outer wallspaced from said inner wall, bonding tiles in said wall, 1netallicmembers provided with hooked ends, one of the hooked ends of each memberpassing downwardy into an opening in the bonding tiles and the other endengaging an opening in a part carried by said outer wall, said metallicmembers being located within the space between 'said inner and outerwalls and-engaging said bonding tiles to maintain said walls inalignment, and means for passing cooling air through the space betweensaid inner and outer walls and over said members.

41. An air cooled furnace wall comprising an inner wall and an outerwall spaced from said inner wall, bonding tiles in said wall. metallicmembers provided with hooked ends, one of the hooked ends of each memberpassing downwardly into an opening in the bonding tiles and the otherend engaging an opening in a part carried by said outer wall, saidmetallic members being located within the space between said inner andouter walls and engaging said bonding tiles to maintain saidwalls inalignment, and means for passing cooling air through the space betweensaid inner and outer walls and over said members, said bonding tilesprojecting into the air space so that the members which serve to keepthe furnace wall in alignment come entirely outside of the furnace wall.

42. A furnace wall comprising inner and outer spaced walls, and membersfor maintainin g said walls in spaced relation, the ends of said memberspassing inside of the surface of'one of said walls, and the parts beingso constructed and. arranged that said members may be placed in positionin said wall after the wall is laid up.

l3. In furnace construction an inner wall and an outer wall spacedfromsaid inner .wall, a metallic member for maintaining said inner wallin position and having at least a p'ortiop thereof located within thespace between said inner and outer walls, and an inlet and an outlet forthe' space between said \\'a1ls..whereb v cooling air ma) be passedthrough said space and over a portion of said metallic member.

H. In furnace construction, an inner wall and an outer wall spaced fromsaid inner wall, the inner wall being provided with bonding tiles, meanscomprising metallic members engaging said bonding tiles for maintainingsaid inner wall in position, and having at least a portion thereoflocated within the space between said inner and over a portion of saidmetallic members.

DAVID, s. JilCOBUS.

outer walls and an inlet and an outlet for v the space between saidwalls whereby cooling air may be passed through said space and

